I can't tell you how many times I used to wish there was an IBM groupmark symbol.
Lol. Yes, my previous Unicode proposal was for the group mark symbol used by IBM mainframes in the 1960s. It was approved, so that symbol will be in the next Unicode release. You may be interested in my related article on mining Bitcoin on a 1960s mainframe:
http://www.righto.com/2015/05/bitcoin-mining-on-55-year-old-ibm-1401.htmlSorry, I didn't notice your actual proposal before. I've read it now, you already have plenty of stuff.
That explains things. For those just joining, my proposal to add the Bitcoin symbol is at
http://righto.com/bitcoin-unicode.pdf and is much more extensive than the unrelated rejected 2011 proposal.
Ken